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Critical concentrat...
Abstract
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- The critical concentration for the metal-nonmetal transition has been calculated for n-type and p-type GaN. Both cubic and hexagonal structures of GaN have been considered. Three different computational methods have been utilized: the first is the original Mott model, the second is an extended Mott-Hubbard model, and the third method is based on total energy of the metallic and the nonmetallic phases. All three methods show a similar value of the critical concentration, about 10(18) and 10(20) cm(-3) for n-type and p-type doped materials, respectively.
Nyckelord
- acceptor binding-energies
- optical-properties
- shallow donors
- n-type
- doped semiconductors
- dynamical properties
- dielectric function
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- aln
- si
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